Tilting device for venetian blinds



March 27,- 1934.

E. WEISFELD TiLTING DEVICE FOR VENETIAN BLINDS Filed 001%. 26, 1933 INVENTO ATTORNEY Patented Mar. 27, 1934 UNITED STATES PATENT OFFICE 4 Claims.

This invention relates to an improvement in a tilting device for Venetian blinds and has for its object to provide a tilting device of simple, study construction which supports the tilt bar of the blind and enables it to be swung to and held at various angles required during the use of the blind.

A feature of the device resides in a simple and improved means by which several parts of the device are maintained together in operative position by means of a single plate spring so that assembly and disassembly of the device is greatly facilitated and the manufacturing cost is resultantly decreased. A further feature of the invention resides in the means by which the tilt bar is positively held in any set position or angle since a positive locking means for holding the segmental plate which supports the tilt bar in any selected position or angle is provided.

More specifically, the invention contemplates the provision of a sheet metal bracket adapted for attachment to the top or stationary bar of the blind, said bracket being pivoted to a segmental plate which supports the tilt bar. The segmental" plate is provided with an arcuate line of recesses, any of which is adapted to be engaged by a spring-pressed dog to hold the segmental plate and the tilt bar carried thereby in any selected angular position with respect to the fixed main bar of the blind.

For a more particular description of the drawing, reference is to be had to the accompanying drawing, forming a part hereof in which Fig. 1

is a front elevation of the improved tilting device; Fig. 2 is a view of the same from below, with the fixed bar'and tilt bar and the operating cord omitted and a part of the lower supporting flange broken away; Fig. 3 is a sectional view on the line H of Fig. 1, looking in the direction of the arrows, the tilt bar being omitted; and Fig. 4 is a side elevation of the device.

In the drawing, 1 indicates the fixed top bar of the blind which is usually supported at its ends in brackets not shown, but secured to the window frame. The tilt bar is shown at 2 and it is attached to the fixed top bar by a bracket portion of the improved tilting device. The tilting device is provided with a supporting bracket having a vertically disposed plate or body portion 3 provided with an upper end bent to form a horizontal flange 9 through which screws 21 extend to secure the bracket to the bottom of the fixed bar 1.

Extending downwardly from the top flange 9 is a flange 8 which extends parallel with and cooperates with the body portion 3 to form a supdependent legs port for a pulley 6 rotatably mounted on a removable spindle 7 extending between and passing through the body portion 3 and the downwardly extending flange 8.

Pivoted at 5 on the inner side of and toward the lower end of the body portion 3, is a segmental plate 4 which is provided near its periphery with an arcuately arranged row of depressions or recesses 20 any one of which is adapted to be engaged by the end 11 of a spring-pressed dog 10; The dog 10 is mounted on a pivot 15 on the outer face of. the body portion 3 and has its operative end 11 forced through an aperture 30 formed in the body portion so that said end can enter into one or another of the recesses 20 in the segmental plate 4 as the plate is rotated. The dog 10 has its opposite end attached to one end of a plate spring 14 which bears against the outer face of the body portion 3 and tends to shift the dog on its pivot 15 and direct-its end 11 through the aperture 30 and into engagement with the recess 20 aligned with the end of the dog The dog 10 is pro 'ded with a pair of lugs 13 which pass through an opening 31 formed in the body portion and on the inner side of the body portion a spindle or pin 12 passes through these lugs. This spindle or pin prevents separation of the dog from the body portion 3.

The tilt bar 2 is attached to the segmental plate 4 by means of screws passing upwardly through holes 16 and 1'7 provided in a longitudinal flange 23 integrally formed on the lower end of the segmental plate. One of these screws, shown at 17a, extends sufficiently below the flange 23 to enable it-to act as an anchorage for the opposite ends of a cord 19, which is in the form of a loop, and extends over the pulley 6 and hangs downwardly to a position convenient to the operator of the blind.

To tilt the bar 2 and resultantly tilt the slats dependent from said bar on flexible tapes, it is merely necessary to pull on one or the other of the of the cord 19. When one leg of the cord is pulled, the segmental plate 4 is turned on its pivot 5 in a clockwise direction, and when the other leg is pulled the plate is turned in an opposite or anti-clockwise direction. At any point in either of these movements the pull on the cord may be ceased and the desired tilt of the bar 2 will be retained since the end 11 of the dog will engage one or the other of the recesses 20. In this way, a positive inclination or tilt of the bar 2 is easily procurable and maintainable.

The rotative movement of the segmental plate 4 in both directions is limited by means of stops 18 located at the opposite ends 01 the plate 4, and formed by bending portions of the plate laterally, one or the other of these stops coming into contact with a laterally bent lug 22 on the body portion 3, when the plate 4 is rotated to the limit of its movement in either direction.

The manner in which the main partsof the device are assembled is asimple one. By withdrawing the pin 12, the body 10 of the dog and the spring 14 carried by it, may be pulled away from the body portion 3; The head of the spindle 7 on which the pulley 6 is mounted, is normally pressed by the spring 14 to hold the spindle in place, so that when the spring is removed, the spindle can be easily drawn outward or toward the left in Fig. 2, so that the pulley can be removed. This simple assembly arrangement enables the device to be easily assembled and defective or broken parts easily replaced without the use of tools.

What I claim 1. A device of the character described comprising, a bracket having means for attaching it to a fixed support, a segmental plate pivotally attached to the bracket, means for limiting the rotative movement of the segmental plate relative to the bracket, recesses in the segmental plate, a springpressed member adapted to enter into engagement with one or another of said recesses as the segmental plate is rotated, a tilt bar attached to the segmental plate, a pulley rotatively mounted on the bracket, and an operating cord attached to the tilt bar and extending over the pulley.

2. A device of the character described comprising, a-bracket having a vertically extending body portion, a segmental plate pivoted on one face pull exerted on the thereoi, an arcuate row of recesses formed in said plate adjacent to its periphery, a spring-pressed dog mounted on the opposite face of the body portion, the body portion being provided with an aperture through which a portion of the dog projects to successively engage the recesses in the segmental plate, means on the plate for supporting a tilt bar, the bracket having spaced flanges for supporting a pulley between them, and an operating cord extending from the tilt bar and passing over the pulley.

3. A device of the character described comprising a bracket carrying a rotatably mounted roller, a plate rotatably mounted on the bracket, a tilt bar supported by the plate, an operating cord extending from the tilt bar and passing over the roller, and a spring-pressed dog mounted on the bracket and engaging the plate and yieldingly resisting rotative movement of said plate under cord 'and holding the plate positively in any position of adjustment.

4. A device of the character described comprising a bracket for attachment to a fixed support, a segmental plate pivotally attached to one side of said bracket, said segmental plate having an arcuate row of recesses, a dog mounted on the opposite side of the bracket, said bracket having an aperture through which a portion of the dog projects to engage the recesses, a spring for exerting pressure on the dog, a spindle projecting from the bracket and held in position in thebracket by pressure of the spring, and a pulley rotatably mounted onthe spindle.

EMANUEL WEISFELD. 

